Question about 1989 GMC K1500

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I have 1989 gmc sierra pickup wont shift 2nd and od shifts 1st and drive only

Transmision wont shift into second gear and over drive

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  • GMC Master
  • 1,413 Answers

You need to retrieve transmissions faulty code with a scanner.
It looks like The PCM (powertrain control module) is in limping mode. It is the default mode when there is a faulty Transmission or engine code.

Hope it helps.

Posted on Feb 18, 2019

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6ya6ya

6ya staff

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Posted on Jan 02, 2017

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Anonymous

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SOURCE: 95 GMC Jimmy 4L60E no 2nd or OD 4L60E

You might want to try this if its got a kick down cable unhook it from throutle body and pull it out as far as you can and let it snap back, do this a few of times, sometimes a valve gets hung up inside valve body of trans. and won't let it shift. If that don't help you may have to pull pan to dislodge it if thats the problem. chk. the plug on trans. (Its a 4 wire white plug) with test light with key on to see if there is power down there one will be hot, thats for overdrive, now on top of intake in front throutle body there is a sending unit that looks like a temp. sending unit with a 2 wire plug on it that sends a signial down to that plug when engine gets to temp. to let it shift to overdrive. Maybe this will help, or give you some ideas.

Posted on Mar 02, 2009

Anonymous

  • 151 Answers

SOURCE: transmision wont shift out of 2nd gear

Maybe, but won't know till you take it too tranny shop. Even iif it is done a rebuilt is still cheaper than brand new. And, less you drive it now less damage done.

Posted on Dec 29, 2008

Anonymous

  • 1 Answer

SOURCE: 93 gmc sierra not shifting into 3rd gear

i dont know how to fix it so go **** yourself!!!!

Posted on Jan 11, 2009

john h

  • 22486 Answers

SOURCE: I have a 2000 GMC sierra 2500 truck. The guy I

-----check possible tps [throttle position sensor ]circuit for damage or faulty sensor----if good check the fuses and trans harness for shorts damage or disconnection,check o2 sensors wiring possible ground to exhaust ,or internal leak 2nd gear apply circuit[servo assembly or 1-2 accumulator] or poor pump pressure

Posted on Feb 13, 2010

squindojr

  • 40 Answers

SOURCE: The transmission is shifting hard going from 1st

rec check fluid first. If trans fluid hasn't been changed in last 30,000 miles change fluid, filter and pan gasket. At that time inspect for foreign materials in bottom of pan or on magnet if you have one. If truck has over 100K and fluid was never changed you may have more problems if changing the fluid.

Posted on Jun 17, 2010

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1 Answer

Transmission slipping in 2nd gear


1 Ck A/T fluid level & quality
2 Scan/ck for code(s)
3 With scan tool connected,road test vehicle/Ck parameters....
....time for a pro !!

If you need further help, reach me via phone at https://www.6ya.com/expert/ralph_2f0886b7d6af32ce

Apr 06, 2014 | GMC Sierra Cars & Trucks

1 Answer

I have a 1996 GMC Sierra with an automatic transmission and just recently as i had been driving for about two hours it dropped out of overdrive for about ten minutes or so then re engaged. then i noticed...


The filter has nothing to do with your issues.

Check for a loose or misadjusted brake switch, for the OD issues.

Maybe Electronic,Sensors or Selenoids,on the shift issues.

May 05, 2010 | 1996 GMC Sierra

1 Answer

I have a 2000 GMC sierra 2500 truck. The guy I bought it from had a new transmition put in it. After driving a while I noticed that the tranny wouldn't shift into low gears 1st & 2nd on comand. and...


-----check possible tps [throttle position sensor ]circuit for damage or faulty sensor----if good check the fuses and trans harness for shorts damage or disconnection,check o2 sensors wiring possible ground to exhaust ,or internal leak 2nd gear apply circuit[servo assembly or 1-2 accumulator] or poor pump pressure

Feb 13, 2010 | 2000 GMC Sierra

1 Answer

4L 60E - 2001 k1500 will not shift into 3-4. Oil is not burn't and stifts great into1-2


  • No 3rd or 4th gear: “3-4” clutches are worn out. R&R. The car is safe to drive (in 2) until you can get it fixed.
  • Trans shifts into gear harshly, car feels sluggish off the line, No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only available gears, CEL is on: Transmission is either in limp-home mode or has lost electrical power. If there are lots of error codes in the PCM, check the under hood fuse that powers the transmission, and if it pops again, look for a short in that circuit like an O2 sensor harness touching exhaust. Otherwise, check PCM codes for a particular fault in the transmission causing the PCM to put it in limp-home mode.
  • No 1st or 4th available; trans shifts 2nd to 3rd by itself in D or OD and locks the converter : Shift A solenoid failed. Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.
Check to see if your transmission is in the limp mode, which would only give you 2nd, 3rd and reverse gears. No 1st or 4th gear.

Nov 19, 2009 | 2003 GMC Sierra 1500

1 Answer

Have a 94 gmc 1500 4.3 automatic when i put it in drive it doesn't shift if i manuely shift from first to drive it will shift it doesn't have any slipping it also has overdrive that doesnt seem to work any...


Transmission does not shift automatically, only manually. Swap in a known-good PCM, check wiring, check other sensors such as VSS and TPS.

Trans shifts into gear harshly, car feels sluggish off the line
, No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only available gears, CEL is on: Transmision is either in limp-home mode or has lost electrical power. If there are lots of error codes in the PCM, check the underhood fuse that powers the transmission, and if it pops again, look for a short in that circuit like an O2 sensor harness touching exhaust. Otherwise, check PCM codes for a particular fault in the transmission causing the PCM to put it in limp-home mode.

Car goes into gear but feels very sluggish like the brakes are dragging, but it will roll easily (starts out in 4th gear), you manually shift to 2 to get it moving, once it's moving you put it back in OD and the car shifts 3rd to 4th on its own and locks the converter at the appropriate time: ShiftB solenoid failed: Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.

Good luck and get back to me, hope this helps.

Nov 16, 2009 | 1994 GMC Sierra

1 Answer

I have a problem with a thm700r4 transmission. i rebuilt the tranmission my self because the clutches were burn but now i have a shifting problem with 3rd & 4th gear it doesnt shift past 2nd gear. it...


Check that the OD solenoid on the torque converter is good still. When the R4 wont go into OD you have no more gears than 1st an 2nd. If the OD clutch drum was relaced if it was burnt, that will make a problem also. You have to have OD in order for these babies to work right.

Nov 13, 2017 | 1984 GMC Suburban

1 Answer

Transmision wont shift out of 2nd gear


Maybe, but won't know till you take it too tranny shop. Even iif it is done a rebuilt is still cheaper than brand new. And, less you drive it now less damage done.

Dec 29, 2008 | 2000 GMC Sierra

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